A number of challenges to the standard Λ CDM model have been emerging during the past
few years as the accuracy of cosmological observations improves. In this review we discuss …

It is well known that quantum field theory (QFT) induces a huge value of the cosmological
constant (CC), Λ, which is outrageously inconsistent with cosmological observations. We …

We explore whether nonstandard dark sector physics might be required to solve the existing
cosmological tensions. The properties we consider in combination are (a) an interaction …

We examine interactions between dark matter and dark energy in light of the latest
cosmological observations, focusing on a specific model with coupling proportional to the …

Abstract Models where dark matter and dark energy interact with each other have been
proposed to solve the coincidence problem. We review the motivations underlying the need …

We investigate the observational consequences of a novel class of stable interacting dark
energy (IDE) models, featuring interactions between dark matter (DM) and dark energy (DE) …

We investigate interacting scenarios that belong to a wider class, since they include a
dynamical dark energy component whose equation of state follows various one-parameter …

We investigate the observational constraints on an interacting vacuum energy scenario with
two different neutrino schemes (with and without a sterile neutrino) using the most recent …

The well-known tensions on the cosmological parameters H_0 H 0 and σ _8 σ 8 within the Λ
Λ CDM cosmology shown by the Planck-CMB and LSS data are possibly due to the …

The answer is yes. We indeed find that interacting dark energy can alleviate the current
tension on the value of the Hubble constant H 0 between the cosmic microwave background …